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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <title>Document</title>
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<body>
    <p id="child">hello world</p>
    <script>
        var p = document.getElementById("child");
        var cp = p.cloneNode(true);
        console.log(cp);
        document.body.appendChild(cp);
    </script>
</body>

</html>